Chapter 4. Error codes and troubleshooting
4.1 Introduction
The XMT1000 flow transmitter is a reliable, easy to maintain
instrument. When properly installed and operated, as
described in Chapter: Installation, the meter provides
accurate flow rate measurements with minimal user
intervention. However, if a problem should arise with the
electronics enclosure or transducers, this chapter explains
how to troubleshoot the XMT1000 flow meter. Indications of a
possible problem include
• Display of an error message on the LCD screen, Vitality
PC software, or HART
• Erratic flow readings
• Readings of doubtful accuracy (e.g., readings that
are not consistent with readings from another flow
measuring device connected to the same process).
If any of the above conditions occur, proceed with the
instructions presented in this chapter.
Note:
For high electrical noise areas, it is recommended that
you use the CE Installation methods in Appendix B.
4.2 Error classification and error
codes
The XMT1000 electronics includes two or more subsystems.
The Transmitter, Flow Measurement unit and/or Option I/O.
The purpose of the Error codes and string is to convey to
the operator about the issues in the specific subsystem.
The communication error indicates that the Transmitter
subsystem has lost communication with Flow measurement
sub-system or the Option I/O sub-system.
Errors in XMT1000 are classified into 5 types as indicated in
the table below:
Table 20: XMT1000 error classification
Error
Classification
Error Number
Subsystem
Communication
Errors
C
n
where n is the
Error number
Transmitter to
Flow or Option I/O
Flow Errors
E
n
where n is the
Error number
Flow subsystem
System Errors
S
n
where n is the
Error number
Transmitter or
Flow subsystem
Transmitter Errors X
n
where n is the
Error number
Transmitter
subsystem
Option I/O Errors
A
n
where n is the
Error number
Option I/O
subsystem
If a problem occurs with the electronics or transducers, a
built-in error code message system greatly simplifies the
troubleshooting process.
All the possible XMT1000 error code messages are discussed
in this chapter, along with the possible causes and the
recommended actions. When an error code is generated,
it will appear in the lower left corner of the LCD screen, as
discussed in Programming Chapter.
If an error message appears on the display screen during
operation of the XMT1000, refer to the appropriate section of
this chapter for instructions on how to proceed. You may be
asked to contact Panametrics. Providing all of the diagnostic
data and parameter information as in the Diagnostics Data
Table prior to calling your local sales or service center will
help to speed up the issue resolution.
4.3 Flow errors (E-errors)
4.3.1 General Guidelines for troubleshooting
flow errors with error codes
If the Error code on the LCD or Vitality PC software indicate
E22: SingleChAccuracy or E23: MultiChAccuracy, refer to the
appropriate section below. Also, refer to Table 21 below for
causes and recommended actions for each Error code.
4.3.1a Single channel error
If only one channel is in error, the most likely causes are:
1. Incorrect programming on Error Limits or flow condition
changes that now make previous programming invalid.
2. Defective/Damaged cables, transducers, incorrect
physical spacing, couplant, buffer or electronics.
After you have tried eliminating/correcting for any most
likely causes mentioned above, if error still exists, also check
Process/flow conditions such as:
1. Excessive turbulence.
2. Discontinuities in fluid characteristics such as multi-
phase flow, flashing, pockets of gas, presence of
bubbles or solid particles, cavitation or rapidly changing
fluid type.
3. Extreme fluid properties, such as pressure or
temperature.
4. Wax build-up inside the pipe.
5. Half-full pipe.
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